After updating R2020a update 3, a warning pop up

After I updated my R2020a update 2 to update 3, a warning "Unrecognized function or variable 'matlab.internal.addons.updates.fileexchangeaddon.getTypeFromPackageInfoUrl'."

Please help me how to solve it.

Thanks.

[Evangelos Rozos]

It must be a bug. I have a crazy problem that must be related. I get "Unrecognized function or variable 'normxcorr2'." when normxcorr2 is called from within a function. However, normxcorr2 works OK when called from command prompt. I have installed MATLAB on drive D: and the project is in drive C:.

UPDATE

>> ver
-----------------------------------------------------------------------------------------------------
MATLAB Version: 9.8.0.1396136 (R2020a) Update 3
MATLAB License Number: DEMO
Operating System: Microsoft Windows 10 Home Version 10.0 (Build 18362)
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
-----------------------------------------------------------------------------------------------------
MATLAB                                                Version 9.8         (R2020a)
Curve Fitting Toolbox                                 Version 3.5.11      (R2020a)
Database Toolbox                                      Version 9.2.1       (R2020a)
Deep Learning Toolbox                                 Version 14.0        (R2020a)
Global Optimization Toolbox                           Version 4.3         (R2020a)
Image Processing Toolbox                              Version 11.1        (R2020a)
Optimization Toolbox                                  Version 8.5         (R2020a)
Parallel Computing Toolbox                            Version 7.2         (R2020a)
Statistics and Machine Learning Toolbox               Version 11.7        (R2020a)
Symbolic Math Toolbox                                 Version 8.5         (R2020a)
Text Analytics Toolbox                                Version 1.5         (R2020a)

[Erich]

I have the same problem and submitted a support request (and referenced this thread). Can you paste the output of 'ver'? Here's mine (formated as commented code just to get monospace font).

% >> ver
% ------------------------------------------------------------------------------------------------------------------
% MATLAB Version: 9.8.0.1396136 (R2020a) Update 3
% MATLAB License Number: xxxxxx
% Operating System: Linux 5.4.0-7634-generic #38~1591219791~20.04~6b1c5de-Ubuntu SMP Thu Jun 4 02:56:10 UTC 2 x86_64
% Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
% ------------------------------------------------------------------------------------------------------------------
% MATLAB                                                Version 9.8         (R2020a)
% Simulink                                              Version 10.1        (R2020a)
% Aerospace Blockset                                    Version 4.3         (R2020a)
% Aerospace Toolbox                                     Version 3.3         (R2020a)
% Chebfun                                               Version 5.7.0               
% Control System Toolbox                                Version 10.8        (R2020a)
% DSP System Toolbox                                    Version 9.10        (R2020a)
% Deep Learning Toolbox                                 Version 14.0        (R2020a)
% GUI Layout Toolbox                                    Version 2.3.4       (R2018b)
% M2HTML Toolbox - A Documentation Generator for ...    Version 1.5                 
% MATLAB Coder                                          Version 5.0         (R2020a)
% MATLAB Compiler                                       Version 8.0         (R2020a)
% MATLAB Compiler SDK                                   Version 6.8         (R2020a)
% Mixed-Signal Library                                  Version 4.0         (R2014a)
% Optimization Toolbox                                  Version 8.5         (R2020a)
% Parallel Computing Toolbox                            Version 7.2         (R2020a)
% Robust Control Toolbox                                Version 6.8         (R2020a)
% Signal Processing Toolbox                             Version 8.4         (R2020a)
% Simulink Coder                                        Version 9.3         (R2020a)
% Simulink Control Design                               Version 5.5         (R2020a)
% Symbolic Math Toolbox                                 Version 8.5         (R2020a)
% System Identification Toolbox                         Version 9.12        (R2020a)

Maybe the error is caused by a particular toolbox?

[ANIL LAMICHHANE]

I do have the same problem as reported by Ka Ming Cheng . Anyone help me please.

[Micke Malmström]

after 3 reeboots of the Matlab-app the error msg disapeared for me...

[Ka Ming Cheng]

Here is the my MATLAB version and installed toolboxes.

% >> ver
% -----------------------------------------------------------------------------------------------------
% MATLAB Version: 9.8.0.1396136 (R2020a) Update 3
% MATLAB License Number: STUDENT
% Operating System: Microsoft Windows 10 Home Version 10.0 (Build 18363)
% Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
% -----------------------------------------------------------------------------------------------------
% MATLAB                                                Version 9.8         (R2020a)
% Simulink                                              Version 10.1        (R2020a)
% Aerospace Toolbox                                     Version 3.3         (R2020a)
% Antenna Toolbox                                       Version 4.2         (R2020a)
% Audio Toolbox                                         Version 2.2         (R2020a)
% Communications Toolbox                                Version 7.3         (R2020a)
% Computer Vision Toolbox                               Version 9.2         (R2020a)
% Control System Toolbox                                Version 10.8        (R2020a)
% Curve Fitting Toolbox                                 Version 3.5.11      (R2020a)
% DSP System Toolbox                                    Version 9.10        (R2020a)
% Data Acquisition Toolbox                              Version 4.1         (R2020a)
% Database Toolbox                                      Version 9.2.1       (R2020a)
% Deep Learning Toolbox                                 Version 14.0        (R2020a)
% Econometrics Toolbox                                  Version 5.4         (R2020a)
% Financial Toolbox                                     Version 5.15        (R2020a)
% Fuzzy Logic Toolbox                                   Version 2.7         (R2020a)
% Global Optimization Toolbox                           Version 4.3         (R2020a)
% Image Acquisition Toolbox                             Version 6.2         (R2020a)
% Image Processing Toolbox                              Version 11.1        (R2020a)
% Instrument Control Toolbox                            Version 4.2         (R2020a)
% MATLAB Coder                                          Version 5.0         (R2020a)
% Mapping Toolbox                                       Version 4.10        (R2020a)
% Model Predictive Control Toolbox                      Version 6.4         (R2020a)
% Navigation Toolbox                                    Version 1.1         (R2020a)
% Optimization Toolbox                                  Version 8.5         (R2020a)
% Parallel Computing Toolbox                            Version 7.2         (R2020a)
% Partial Differential Equation Toolbox                 Version 3.4         (R2020a)
% RF Toolbox                                            Version 3.8         (R2020a)
% ROS Toolbox                                           Version 1.1         (R2020a)
% Reinforcement Learning Toolbox                        Version 1.2         (R2020a)
% Robotics System Toolbox                               Version 3.1         (R2020a)
% Robust Control Toolbox                                Version 6.8         (R2020a)
% Sensor Fusion and Tracking Toolbox                    Version 1.3         (R2020a)
% Signal Processing Toolbox                             Version 8.4         (R2020a)
% Simscape                                              Version 4.8         (R2020a)
% Simscape Driveline                                    Version 3.1         (R2020a)
% Simscape Electrical                                   Version 7.3         (R2020a)
% Simscape Fluids                                       Version 3.0         (R2020a)
% Simscape Multibody                                    Version 7.1         (R2020a)
% Simulink 3D Animation                                 Version 9.0         (R2020a)
% Simulink Coder                                        Version 9.3         (R2020a)
% Simulink Control Design                               Version 5.5         (R2020a)
% Simulink Design Optimization                          Version 3.8         (R2020a)
% Stateflow                                             Version 10.2        (R2020a)
% Statistics and Machine Learning Toolbox               Version 11.7        (R2020a)
% Symbolic Math Toolbox                                 Version 8.5         (R2020a)

Answer 1

[Erich]

This is the response I got from MathWorks support:

"Thanks for sharing the information. Our development team has been aware of this error message and it will be fixed in MATLAB R2020a Update 4. This error message won't affect your ability of using MATLAB, so please ignore it for now."

[Brad]

The error persists in R2020a Update 4.

Answer 2

[Brad]

I had the same issue. I was able to fix the problem by entering a few simple commands (shown below). Note this process will reset MATLAB's path settings to factory default, so you may want to backup your current path like so:

>> savepath([pwd filesep 'pathbackup.m'])

To fix the warning message issue, enter the following commands...

>> rehash toolboxcache
>> restoredefaultpath
>> savepath
>> exit

The exit command will close MATLAB. After the program shuts down, restart MATLAB; the warning message should no longer appear. Upvote if it works! Comment if not!

[Erich]

Brad,

I did not need to take any of the steps you described. For me, updating to R2020a Update 4 was enough to get rid of the error message.

Erich